Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d8fac5af5e8248…

MALICIOUS

PDF

73.4 KB Created: 2021-05-01 03:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ef799d4167069d1e0de891b247e5015c SHA-1: 573f25741ef80e061da411094bc7fad8abec2df6 SHA-256: 09d8fac5af5e82481b20f0d8d2641c4df0e033bb1fd84a5f0e4b206708791b6f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/strik?utm_term=the+red+tent+movie+on+netflix PDF link annotation
    • http://barbanapoli.moscow/94330473408ltaod.pdfIn PDF document text
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/vujaxaxinit.pdfIn PDF document text
    • https://danivuvi.weebly.com/uploads/1/3/1/4/131407625/7343902.pdfIn PDF document text
    • https://jelonuzekuxenu.weebly.com/uploads/1/3/2/8/132814084/6018565.pdfIn PDF document text
    • https://lakimavowowilif.weebly.com/uploads/1/3/4/7/134770541/giladugu-gitiwileka.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/hgjTgiI/parkour_spiral_map_2.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/ayman_sadiq_book_free_download.pdfIn PDF document text
    • https://navitadewota.weebly.com/uploads/1/3/4/0/134017874/xanetopijevil-rawawo-dovofenosuzi-vavugeg.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/gAK4z4Y/ledinijefopanev.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/what_was_special_about_apollo_13.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/gshhijC/sakug.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/hbnhgha/kenanejisobapuxifeve.pdfIn PDF document text
    • http://center-san.ru/lutron_caseta_programming_guidez2849.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/dijQvic/ribiviwafakovavafuda.pdfIn PDF document text
    • http://abanca-electronica.com/wiwolegyve5.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/N2hiia8/spirited_away_dragon_drawing.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/hi2Nij7/i_tag_icon_size.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/GifjeP3/gizoserasoral.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/natewared/a_discovery_of_witches_season_2_episodes.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/39137906313.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/five_ten_guide_tennie.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/maytag_centennial_dryer_specs.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 4836 bytes
SHA-256: 94213eacc472fa4a964a60dc5fccb8a6c7a324e48728a80bb0e0b5b4b5b60e66
font_01_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 10536 bytes
SHA-256: 6e365873629fa224c9b2d2e2d7a433863a21dcafcef991b9026a3e0dc8ff393f

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